phase_adjust.c

完整的OFDM系统,含Matlab仿真代码和DSP源代码下载.平台Tms320C6000.含项目说明文档.绝对高质量的源代码.

//phase_adjust.c
//
// Project Red 2002: High Performance OFDM Modem 
// Against Channel Imperfections
// Auther: Linus Falk

#include <mathf.h>
#include "ofdm.h"
#include "complex_math.h"

#pragma DATA_MEM_BANK(phase_coef, 0);
static float phase_coef[127*2];

//void complex_multiplication(float *c1, float *c2);

void phase_adjust(float *frame){
	int i;
	#pragma MUST_ITERATE(127,127);
	for(i=0; i<127; i++){
		complex_multiplication(frame+i*2, phase_coef+i*2);
	}
}

//calculates the coeficients needed for phase_adjust
#pragma CODE_SECTION(init_phase_adjust,"SDRAM1_DATA_MEM");
void init_phase_adjust(void){
	int i;
	const float arg = 2*PI*16/256;
	
	#pragma MUST_ITERATE(127,127);
	for(i=0; i< 127; i++){
		phase_coef[i*2] = cosf((i+1)*arg);
		phase_coef[i*2+1] = sinf((i+1)*arg);
	}

}